package com.rockblade.generator.utils.spring;

import com.baomidou.mybatisplus.extension.service.IService;
import com.rockblade.generator.core.domain.BaseEntity;
import com.rockblade.generator.utils.StringUtils;
import org.springframework.aop.framework.AopContext;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

/**
 * spring工具类 方便在非spring管理环境中获取bean
 *
 * @author DB
 */
@Component
public final class SpringUtils implements BeanFactoryPostProcessor, ApplicationContextAware {
    /**
     * Spring应用上下文环境
     */
    private static ConfigurableListableBeanFactory beanFactory;

    private static ApplicationContext applicationContext;

    @Override
    public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {
        SpringUtils.beanFactory = beanFactory;
    }

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        SpringUtils.applicationContext = applicationContext;
    }

    /**
     * 获取对象
     *
     * @param name
     * @return Object 一个以所给名字注册的bean的实例
     * @throws org.springframework.beans.BeansException
     */
    @SuppressWarnings("unchecked")
    public static <T> T getBean(String name) throws BeansException {
        return (T) beanFactory.getBean(name);
    }

    /**
     * 获取类型为requiredType的对象
     *
     * @param clz
     * @return
     * @throws org.springframework.beans.BeansException
     */
    public static <T> T getBean(Class<T> clz) throws BeansException {
        T result = (T) beanFactory.getBean(clz);
        return result;
    }

    /**
     * 如果BeanFactory包含一个与所给名称匹配的bean定义，则返回true
     *
     * @param name
     * @return boolean
     */
    public static boolean containsBean(String name) {
        return beanFactory.containsBean(name);
    }

    /**
     * 判断以给定名字注册的bean定义是一个singleton还是一个prototype。 如果与给定名字相应的bean定义没有被找到，将会抛出一个异常（NoSuchBeanDefinitionException）
     *
     * @param name
     * @return boolean
     * @throws org.springframework.beans.factory.NoSuchBeanDefinitionException
     */
    public static boolean isSingleton(String name) throws NoSuchBeanDefinitionException {
        return beanFactory.isSingleton(name);
    }

    /**
     * @param name
     * @return Class 注册对象的类型
     * @throws org.springframework.beans.factory.NoSuchBeanDefinitionException
     */
    public static Class<?> getType(String name) throws NoSuchBeanDefinitionException {
        return beanFactory.getType(name);
    }

    /**
     * 如果给定的bean名字在bean定义中有别名，则返回这些别名
     *
     * @param name
     * @return
     * @throws org.springframework.beans.factory.NoSuchBeanDefinitionException
     */
    public static String[] getAliases(String name) throws NoSuchBeanDefinitionException {
        return beanFactory.getAliases(name);
    }

    /**
     * 获取aop代理对象
     *
     * @param invoker
     * @return
     */
    @SuppressWarnings("unchecked")
    public static <T> T getAopProxy(T invoker) {
        return (T) AopContext.currentProxy();
    }

    /**
     * 获取当前的环境配置，无配置返回null
     *
     * @return 当前的环境配置
     */
    public static String[] getActiveProfiles() {
        return applicationContext.getEnvironment().getActiveProfiles();
    }

    /**
     * 获取当前的环境配置，当有多个环境配置时，只获取第一个
     *
     * @return 当前的环境配置
     */
    public static String getActiveProfile() {
        final String[] activeProfiles = getActiveProfiles();
        return StringUtils.isNotEmpty(activeProfiles) ? activeProfiles[0] : null;
    }

    /**
     * @param clazz
     * @param <T>
     * @return 返回Spring容器中service对象，防止Service循环调用出现的异常
     */
    public <T extends BaseEntity> IService<T> getServiceBean(Class<T> clazz) {
        String name = clazz.getSimpleName();
        String service = nameToService(name);
        return (IService<T>) getBean(service);
    }

    private String nameToService(String name) {
        String entity = name.substring(0, 1).toLowerCase() + name.substring(1);
        return entity.replaceAll("", "") + "Service";
    }

    public <T extends Object, E> List<T> copyProperties(List<E> sources, Class<T> clazz) {
        List<T> list = new ArrayList<>();
        if (sources == null || sources.isEmpty()) {
            return list;
        }
        for (E item : sources) {
            T t = null;
            try {
                t = clazz.newInstance();
            } catch (InstantiationException | IllegalAccessException e) {
                e.printStackTrace();
                throw new RuntimeException(e.getMessage());
            }
            BeanUtils.copyProperties(item, t);
            list.add(t);
        }
        return list;
    }

    /**
     * StringToList
     *
     * @param longs
     * @return
     */
    public List<Long> stringToLongList(String longs) {

        if (StringUtils.isBlank(longs)) {
            return null;
        }
        String[] split = longs.split(",");
        return Arrays.stream(split).map(Long::valueOf).collect(Collectors.toList());
    }
}
